>> Why it had to be rebuilt? Was there a really unsuccessful attempt of a handover? This is a good question. It could be either that management is incompetent

>> Why it had to be rebuilt? Was there a really unsuccessful attempt of a handover? This is a good question. It could be either that management is incompetent or that the code was unmaintainable. But still, the fact that it took a team of people much longer to build does prove a point. For projects of this size, it's difficult to build them fast unless the code is maintainable, even if it's just a team of 1. There can be some extreme cases of corner-cutting which can deliver fast short term results but even this has its limits. The complexity or security issues tend to catch up with you quite quickly.